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Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air environment for which T? = 325 K and h = 20 W/m2/K. Assuming the properties of the steel to be
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Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air environment for which T? = 325 K and h = 20 W/m2/K. Assuming the properties of the steel to be k = 40 W/m2K, ? = 7800 kg/m3, and c = 600 J/kg/K, estimate the time required for the cooling process.

User Jesse Bunch
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Answer:

It will take the steel 425.925sec to cool from 1150k to 400k

Step-by-step explanation:

Detailed explanation and calculation is shown in the image

Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling-example-1
User Prabhat Kumar Jena
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